The Simpson MSTA 12-in. 18-Gauge ZMAX Galvanized Medium Strap Tie is an engineered connector from Simpson built to resist tension loads in wood-to-wood uplift applications. Designed specifically for use on the edge of 2x members, this 12-inch strap tie features a staggered nail pattern that helps minimize wood splitting during installation, making it a dependable solution for floor-to-floor clear span connections. Its ZMAX galvanized finish delivers enhanced corrosion resistance, keeping it well suited for exterior environments and treated-wood assemblies where added protection matters.

Key Features

• Load-rated construction with correct thickness and fastener count - eliminates the guesswork of field-fabricated straps and ensures predictable, code-compliant tension load performance
• Increased load values for wind and seismic forces - provides greater confidence in high-demand structural applications where uplift resistance is critical
• Staggered nail pattern - reduces the risk of wood splitting during fastening, helping maintain the structural integrity of connected members
• Floor-to-floor clear span application - engineered for continuous strap connections across framing levels, simplifying layout and installation
• Designed for use on the edge of 2x members - ensures proper fit and alignment in standard light-frame wood construction
• ZMAX galvanization - offers extra corrosion resistance compared to standard galvanized coatings, making this strap tie a reliable choice for exterior and treated-wood applications
• 18-gauge steel construction - delivers the strength and rigidity required for rated uplift and tension load resistance without adding unnecessary bulk
• Compatible with 10d common nails or #9 x 1 1/2 in. Strong-Drive SD screws - gives installers flexibility to use common fasteners already on the job site for a fully load-rated connection

Why This Product

• Engineered reliability over field-built alternatives - unlike shop-bent or field-fabricated straps, this connector is load rated with the correct gauge, dimensions, and fastener schedule, removing uncertainty from tension and uplift connections
• Built for demanding exposure conditions - the ZMAX coating goes beyond standard galvanization to protect against corrosion in exterior settings and alongside treated lumber, reducing long-term maintenance concerns
• Optimized for wood preservation - the staggered nail pattern actively works to prevent splitting in 2x framing members, protecting the host material while maintaining a strong, rated connection
• Rated for wind and seismic loads - with load values specifically increased for wind and seismic forces, this strap tie is a practical choice for builders working in regions with elevated structural performance requirements

Specifications

• MPN: MSTA12Z
• Length: 12 in.
• Width: 1-1/4 in.
• Gauge: 18
• Coating: ZMAX
• Finish: ZMAX
• Member Size: 2x
• Install With: 10d common nails or #9 x 1-1/2 in. Strong-Drive SD screws (sold separately)
• Country of Origin: United States

Approved Applications

• Wood-to-wood uplift and tension load resistance
• Floor-to-floor clear span connections
• Edge-of-member installations on 2x lumber
• Exterior applications requiring enhanced corrosion resistance
• Treated-wood applications where ZMAX coating is recommended

Frequently Asked Questions

What type of fasteners should be used to install the MSTA12Z?

The MSTA12Z should be installed with 10d common nails or #9 x 1-1/2 in. Strong-Drive SD screws for proper load-rated performance.

Why is the ZMAX coating important for the MSTA12Z?

ZMAX galvanization offers extra corrosion resistance, making the MSTA12Z suitable for exterior and treated-wood applications where standard galvanized coatings may not provide adequate protection.

How does the staggered nail pattern on the MSTA12Z benefit the installation?

The staggered nail pattern is specifically designed to help minimize wood splitting during installation, which helps maintain the structural integrity of the connected members.

What distinguishes a load-rated strap tie from a field-fabricated strap?

Unlike field-fabricated straps, the MSTA12Z is load rated with the correct thickness and number of fasteners, ensuring predictable and code-compliant performance for resisting tension loads in wood-to-wood uplift applications.

Note: Product dimensions and/or screw or bolt holes may differ from picture. Please see item description for specifications.